AlphaTALK VoIP set-up

Long story short, I'm setting up a new business and I'm looking for a good VOIP setup. I know to stay away from traditional phone lines and go with VOIP because of it being cheap, and the features that come with VOIP are well equipped to deal with business-y things. I'm based in Birmingham so I've been looking at companies in Birmingham to supply us with our VOIP Hardware/Software. One company we came across was "AlphaTALK". Does anyone have any previous experience with them? Any other recommendations??